RU2012118770A - METHOD FOR DETERMINING NANOVIBRATION AMPLITUDE BY LASER AUTODINE SIGNAL - Google Patents
METHOD FOR DETERMINING NANOVIBRATION AMPLITUDE BY LASER AUTODINE SIGNAL Download PDFInfo
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- RU2012118770A RU2012118770A RU2012118770/28A RU2012118770A RU2012118770A RU 2012118770 A RU2012118770 A RU 2012118770A RU 2012118770/28 A RU2012118770/28 A RU 2012118770/28A RU 2012118770 A RU2012118770 A RU 2012118770A RU 2012118770 A RU2012118770 A RU 2012118770A
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
Способ измерения амплитуды нановибраций, заключающийся в том, что освещают объект лазерным излучением, преобразуют отраженное от него излучение в электрический автодинный сигнал, раскладывают сигнал в спектральный ряд и измеряют значение амплитуды гармоники Sна частоте колебания объекта Ω, отличающийся тем, что на объект накладывают дополнительные механические колебания на частоте Ω, измеряют максимальное значение гармоники S, на частоте Ωпри изменении амплитуды дополнительных механических колебаний, увеличивают амплитуду дополнительных механических колебаний до появления на автодинном сигнале интерференционных максимумов и минимумов на выделенном участке времени между точками, соответствующими крайним положениям смещения объекта, вычисляют отношение времени убывания tавтодинного сигнала ко времени его нарастания tна выделенном участке времени, при этом, если значение t/tбольше 1, то вычисляют t/t, по зависимости t/t(С) или t/t(C) определяют уровень внешней оптической обратной связи С, вычисляют S/S, по зависимости S/S(ξ, C) при определенном ранее С находят амплитуду нановибраций ξ.A method of measuring the amplitude of nanovibrations, which consists in illuminating the object with laser radiation, converting the radiation reflected from it into an electric autodyne signal, spreading the signal into a spectral series, and measuring the value of the harmonic amplitude S at the object vibration frequency Ω, characterized in that additional mechanical vibrations at a frequency Ω, measure the maximum value of the harmonic S, at a frequency Ω with a change in the amplitude of additional mechanical vibrations, increase the amplitude Before the appearance of interference maxima and minima on the autodyne signal in the selected time interval between the points corresponding to the extreme positions of the object displacement, the ratio of the decay time of the autodyne signal to its rise time t in the selected time interval is calculated, if t / t is greater than 1, then t / t is calculated, t / t (C) or t / t (C) is used to determine the level of external optical feedback C, S / S is calculated, and S / S (ξ, C) is determined using the S / S (ξ, C) dependence and the amplitude is found nanowib radios ξ.
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RU2012118770/28A RU2507487C2 (en) | 2012-05-04 | 2012-05-04 | Method to determine amplitude of nanovibrations by signal of laser autodyne |
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RU2012118770/28A RU2507487C2 (en) | 2012-05-04 | 2012-05-04 | Method to determine amplitude of nanovibrations by signal of laser autodyne |
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RU2012118770A true RU2012118770A (en) | 2013-11-10 |
RU2507487C2 RU2507487C2 (en) | 2014-02-20 |
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RU2012118770/28A RU2507487C2 (en) | 2012-05-04 | 2012-05-04 | Method to determine amplitude of nanovibrations by signal of laser autodyne |
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Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
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RU2060475C1 (en) * | 1993-04-15 | 1996-05-20 | Саратовский государственный университет им. Н.Г.Чернышевского | Method of measurement of harmonic oscillation amplitudes |
RU2098776C1 (en) * | 1995-08-23 | 1997-12-10 | Саратовский государственный университет им.Н.Г.Чернышевского | Method studying periodic vibrations |
US6208424B1 (en) * | 1998-08-27 | 2001-03-27 | Zygo Corporation | Interferometric apparatus and method for measuring motion along multiple axes |
RU2193166C2 (en) * | 2000-01-17 | 2002-11-20 | Российский Федеральный Ядерный Центр - Всероссийский Научно-исследовательский институт технической физики им. академика Е.И. Забабахина | Method of setting fixed amplitudes of vibrations |
RU2208769C1 (en) * | 2002-04-25 | 2003-07-20 | Усанов Дмитрий Александрович | Vibration amplitude determination method |
RU2247395C1 (en) * | 2003-08-14 | 2005-02-27 | Саратовский государственный университет им. Н.Г. Чернышевского | Method of measuring velocity of object |
RU2300085C1 (en) * | 2005-11-09 | 2007-05-27 | ГОУ ВПО "Саратовский государственный университет им. Н.Г. Чернышевского" | Mode of definition of the amplitude of vibration on two harmonies of the spectrum of an autodyne signal |
JP2008275515A (en) * | 2007-05-01 | 2008-11-13 | Sony Corp | Vibration detector |
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